Home / 16,890.60-25,319.70-13,140.30

Finding the Fourth Proportional to 16,890.60, 25,319.70 and 13,140.30

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Solution

The fourth proportional to 16,890.60, 25,319.70 and 13,140.30 is: 19,697.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,890.60 : 25,319.70 = 13,140.30 : x
  2. Step 2: Convert to fraction form
    16,890.60/25,319.70 = 13,140.30/x
  3. Step 3: Cross multiply
    16,890.60x = 25,319.70 × 13,140.30
  4. Step 4: Simplify right side
    16,890.60x = 332,708,453.91
  5. Step 5: Solve for x
    x = 332,708,453.91/16,890.60
  6. Step 6: Final answer
    x = 19,697.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.